Bacteria Cell Sturcture Flashcards
What is the size of bacteria?
E. coli (1 by 3) micrometres
What are the most common shapes of bacteria?
cocci and bacillus (rods)
What is vibrio?
curved rods
What is spirilla?
twisted rod
What is spirochete?
flexible twisted rod
What is the shape and gram of Troponema pallidium?
gram -ive spirochete
What do most bacteria divide by?
binary fission (split into 2)
When cells remain stuck during division how do they form?
pairs, chains or clusters
What is Cyanobacteria?
gram -ive photosynthetic bacteria, live in H20
What is special about Cyanobacteria?
multicellular filamentous and have specialized cells as part of filaments
What is heterocysts?
used to fix N2 in Cyanobacteria
What is the genus Streptomyces?
gram +ive, found in soil as branching filaments
What is monomorphic?
one shape, most bacteria, eg. E. coli
What is pleomorphic?
variety of shapes
Do all bacteria have a plasma membrane?
Yes
Do all bacteria have a cell wall?
most do
What is gram -ive bacteria?
have an outer membrane as part of cell wall
What is periplasmic space
the space btwn the outer membrance and PM
What is periplasm?
the fluid of the periplasmic space
Do gram +ive have an outer membrane?
No
Do bacteria have a capsule/slimy layer on their outer surface?
many do
do bacteria have flagella and other appendages
many do
do bacteria have membrane bound organelles?
most do NOT
